A thread break detection device for a sewing apparatus, a sewing apparatus, and a thread break control method

Abstract

This application relates to a thread breakage detection device, a sewing machine, and a thread breakage control method for sewing equipment. The thread breakage detection device includes: a detection component for detecting the thread breakage state and generating a breakage signal accordingly; a first drive component including a sewing machine spindle and a spindle motor connected in a transmission relationship, the spindle motor stopping upon receiving the breakage signal; and a second drive component including a fabric feeding mechanism driven by the sewing machine spindle and a needle pitch adjustment motor for changing the transmission relationship between the sewing machine spindle and the fabric feeding mechanism, the needle pitch adjustment motor changing the needle pitch accordingly based on the breakage signal. This application, by having the needle pitch adjustment motor change the needle pitch according to the breakage signal, ensures that the needle only penetrates the existing needle eye on the fabric, avoiding fabric damage and waste. It has advantages such as good adaptability, fast response, simple structure, and high production efficiency.

Description

Technical Field

[0001] This application relates to the field of sewing equipment technology, and in particular to a thread breakage detection device, sewing equipment, and thread breakage control method for sewing equipment. Background Technology

[0002] Sewing machines primarily use threads to join multiple layers of fabric together. With continuous technological advancements, sewing machines now come in various styles and are used in sewing operations for different types of fabrics. Examples include multi-needle flat sewing machines and multi-needle cylinder sewing machines, which are used for sewing multiple parallel threads.

[0003] Existing sewing machines are prone to thread breakage during sewing due to excessive thread tension, burrs on parts, and needle overheating. Sewing machines need to perform appropriate actions to address thread breakage and prevent damage to the fabric. Current technology primarily uses sensors to measure signals such as thread path and tension. When the main controller detects an abnormal signal, it determines that a thread has broken, shuts off the spindle motor power, and sends a warning signal to the operator.

[0004] However, the main spindle motor cannot be stopped abruptly after a power outage. Before it stops, the main spindle motor will continue to sew 6 to 7 stitches due to inertia. During this process, the needle will poke several holes in the fabric (especially leather or nylon fabric), affecting the appearance of the fabric and requiring manual repair. In severe cases, it may even render the fabric unusable. Summary of the Invention

[0005] This application provides a thread breakage detection device for sewing equipment. After detecting a thread breakage signal, the needle only penetrates the original needle eye on the sewing material, reducing the impact of thread breakage on the sewing process.

[0006] One embodiment of this application discloses a thread breakage detection device for sewing equipment, comprising:

[0007] A detection component is used to detect the breakage status of the suture and generate a breakage signal accordingly.

[0008] The first drive assembly includes a sewing machine spindle and a spindle motor that are connected by a transmission, the spindle motor stopping in response to the thread breakage signal;

[0009] The second drive assembly includes a fabric feeding mechanism driven by the sewing machine spindle and a stitch length adjustment motor that changes the transmission relationship between the sewing machine spindle and the fabric feeding mechanism. The stitch length adjustment motor changes the stitch length accordingly based on the thread breakage signal.

[0010] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0011] In one embodiment, the detection component includes:

[0012] A thread spool for winding the sewing thread and rotating under the drive of the sewing thread; the thread spool stops rotating when the sewing thread is broken.

[0013] A detector senses the rotation of the spool and generates the wire breakage signal when the spool stops rotating.

[0014] In one embodiment, the reel is fixedly mounted with a magnetic element, and the detector has an induction coil located on the outer periphery of the reel to detect the movement of the magnetic element.

[0015] In one embodiment, the detection component further includes:

[0016] A damping component interacts with the spool to suppress the rotation of the spool in the event of a broken wire.

[0017] In one embodiment, the needle spacing adjusting motor adjusts the needle spacing to 0 or a negative needle spacing according to the thread breakage signal, and the fabric feeding mechanism stops feeding or reverses feeding accordingly.

[0018] In one embodiment, the thread breakage detection device further includes a first thread clamp and a second thread clamp arranged sequentially along the direction of thread movement, with the thread wheel located between the first thread clamp and the second thread clamp.

[0019] In one embodiment, the first wire clamp includes:

[0020] The bracket has an inlet and an outlet cable hole;

[0021] A thread clamping component is installed on the bracket along the direction of thread movement, and the thread wheel is located between the thread clamping component and the thread outlet hole.

[0022] One embodiment of this application also discloses a sewing device, including the thread breakage detection device described in this application.

[0023] One embodiment of this application discloses a method for controlling thread breakage in a sewing machine, including:

[0024] Detects the suture condition and generates a suture breakage signal when the suture is broken;

[0025] In response to the thread breakage signal, the main spindle motor of the sewing equipment stops running and the stitch length is changed accordingly.

[0026] In one embodiment, when detecting the state of the suture, a thread wheel that follows the suture is provided, and the state of the suture being determined when the thread wheel stops rotating is the state of the broken suture.

[0027] The method for changing the stitch spacing is as follows:

[0028] Adjust the stitch length to 0 stitch length so that the position of the last needle hole on the fabric before the thread breaks corresponds to the position of the needle of the sewing machine;

[0029] Alternatively, adjust the stitch length to a negative stitch length so that the fabric moves in the opposite direction to its movement before the thread breaks, and the movement distance is 1 to 8 stitch lengths.

[0030] In the technical solution disclosed in this application, the needle pitch adjustment motor changes the needle pitch according to the thread breakage signal, so that the needle only penetrates the original needle eye on the sewing material, avoiding damage and waste of the sewing material. Compared with the prior art and the control of the spindle motor, the needle pitch adjustment motor has low cost, simple structure, fast response and good effect. It can reduce the upgrade cost of existing products while ensuring the sewing material protection effect in case of thread breakage. It has the advantages of good adaptability and high production efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the sewing equipment structure in one embodiment of this application;

[0033] Figure 2 for Figure 1 A partial cross-sectional view of a sewing machine;

[0034] Figure 3 for Figure 1 A schematic diagram of the internal components of a sewing machine.

[0035] Figure 4 This is a magnified schematic diagram of the detection component.

[0036] Figure 5 This is a schematic diagram of the cooperation between the sewing thread and the thread wheel in one embodiment;

[0037] Figure 6 This is a schematic flowchart of a thread breakage control method for a sewing device in one embodiment of this application.

[0038] The component labels are as follows:

[0039] 100. Detection assembly; 110. Wire reel; 111. Wire winding groove; 112. Rotating shaft; 120. Detector; 121. Magnetic component; 122. Induction coil; 130. First wire clamp; 131. Bracket; 132. Wire inlet hole; 133. Wire outlet hole; 134. Wire clamping component; 140. Second wire clamp;

[0040] 200. First drive assembly; 210. Sewing machine spindle; 211. Needle; 212. Rotary hook;

[0041] 300. Second drive assembly; 310. Stitch pitch adjustment motor; 311. Adjustment linkage; 320. Fabric feeding mechanism; 321. Fabric feeding shaft; 322. Fabric feeding crank; 323. Fabric feeding frame;

[0042] 900, sewing thread; 910, machine casing; 920, sewing material. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level (or in a usage state, or from a certain viewpoint in the drawing) than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level (or in a usage state, or from a certain viewpoint in the drawing) than the second feature.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0048] To ensure that the needle 211 does not create a needle hole in the fabric 920 after a thread breakage signal is detected, please refer to the attached document. Figure 1 To be continued Figure 3 As shown, one embodiment of this application discloses a thread breakage detection device for sewing equipment, including a detection component 100, a first drive component 200, and a second drive component 300.

[0049] The detection component 100 is used to detect the breakage state of the sewing thread 900 and generate a breakage signal accordingly. The breakage signal can be a real signal, such as emitting an electrical signal when a breakage is detected; conversely, the breakage signal can also be a signal that is missing compared to the normal state. For example, during normal sewing, the detection component continuously emits a normal signal, but when a breakage is detected, the detection component stops emitting a normal signal. The cessation of emitting a normal signal can also be understood as a breakage signal.

[0050] The first drive assembly 200 includes a sewing machine spindle 210 and a spindle motor that are connected in a transmission connection; the second drive assembly 300 includes a fabric feeding mechanism 320 driven by the sewing machine spindle 210 and a stitch length adjustment motor 310 that changes the transmission relationship between the sewing machine spindle 210 and the fabric feeding mechanism 320.

[0051] Under normal circumstances, the main spindle motor provides power to the main spindle 210 of the sewing equipment to enable the operation of various components of the sewing equipment, such as the needle 211, the rotary hook 212, and the fabric feeding mechanism 320. The fabric feeding mechanism 320 propels the fabric 920 according to preset conditions. The needle 211 and the rotary hook 212 cooperate to form a stitch on the fabric 920. On the stitch, the needle 211 sequentially penetrates the fabric 920 and cooperates with the rotary hook 212 according to a preset stitch length. When the detection component 100 generates a thread breakage signal, the main spindle motor stops according to the thread breakage signal, and the stitch length adjustment motor 310 (e.g., a stepper motor) changes the stitch length accordingly based on the thread breakage signal. When the stitch length changes, the fabric feeding mechanism 320 changes its transmission relationship with the sewing equipment spindle 210, thereby achieving the technical effect that even if the needle 211 continues to move, it will only pass through the original needle eye on the sewing fabric 920, avoiding damage and waste to the sewing fabric 920. Compared with existing technologies and the control of the spindle motor, the stitch length adjustment motor 310 has the advantages of low cost, simple structure, fast response and good effect.

[0052] For details on setting up the detection component 100, please refer to the appendix. Figure 4 and attached Figure 5 In the illustrated embodiment, the detection component 100 includes a thread wheel 110 and a detector 120. The thread wheel 110 is wound with the thread 900 and rotates under the drive of the thread 900. When the thread 900 is broken, the thread wheel 110 stops rotating. To facilitate the cooperation between the thread wheel 110 and the thread 900, the thread wheel 110 is a cylindrical shape with enlarged ends and a narrowed middle section forming a winding groove 111. A friction-enhancing structure can be provided in the winding groove 111 to improve the driving effect of the thread 900 on the thread wheel 110. The friction-enhancing structure can be a non-smooth surface or spaced friction grooves within the winding groove 111. The thread 900 can wrap around the winding groove 111 one or more times. (See attached diagram.) Figure 5 As shown, the thread 900 wraps at least once around the winding groove 111 of the spool 110 to drive the spool 110 during its movement. Accordingly, the thread 900 can be wound on the spool counterclockwise or clockwise. In different embodiments, the thread 900 wound on the spool 110 can be either top thread or bottom thread. (See attached diagram.) Figure 1 As shown, the thread 900 wound on the spool 110 is a top thread. The spool 110 is rotatably mounted on the outer side of the sewing machine housing 910 via a pivot 112, and is close to the needle 211. The rotation or stopping of the spool 110 is detected by a detector 120. The detector 120 senses the rotation of the spool 110 and generates a thread breakage signal when the spool 110 stops rotating.

[0053] The detector 120 can take many forms, such as rotational speed sensors, motion sensors, light sensors, distance sensors, etc. (See attached diagram.) Figure 4In the design, a magnetic component 121 is fixedly mounted on a reel 110. The reel 110 has mounting grooves for the magnetic component 121, which is then fitted into these grooves. Multiple magnetic components 121 are provided, with their magnetic poles facing the same or different directions. Figure 4 Two magnetic elements 121 are provided and symmetrically arranged with respect to the rotating shaft 112. The magnetic elements 121 are located on the side of the reel 110 facing away from the housing 910 and their outer surfaces are flush with the outer surface of the reel 110. The end of the rotating shaft 112 is enlarged to hold the magnetic elements 121 in the mounting groove. The detector 120 has an induction coil 122 located on the outer periphery of the reel 110 to detect the movement of the magnetic elements 121.

[0054] When the needle 211 is sewing normally, the take-up lever of the sewing equipment drives the thread 900 to continuously pull from the spool. The thread 900 passes through and drives the spool 110 to rotate around the shaft 112. The magnetic component 121 on the spool 110 rotates and generates electromagnetic induction with the induction coil 122. The induction coil 122 generates a corresponding electrical signal, which can be considered as no thread breakage. When the thread breaks, the thread 900 can no longer drive the spool 110 and the magnetic component 121 to rotate, and the electrical signal on the induction coil 122 disappears, which can be understood as a thread breakage signal.

[0055] This application employs a thread breakage detection method using a combination of magnetic component 121 and induction coil 122, which offers advantages such as high sensitivity and good stability. During normal sewing, the electrical signal generated by induction coil 122 constitutes a heartbeat message, triggering corresponding actions when a thread breakage occurs or the detection component 100 malfunctions, thereby avoiding delays in detection due to component damage. Simultaneously, the magnetic component 121 and induction coil 122 have minimal impact on the movement of the sewing thread 900, and will not negatively affect normal sewing.

[0056] Furthermore, to prevent the spool 110 from continuing to rotate after a thread breakage due to its inertia, the spool 110 can also be equipped with a corresponding speed reduction component. For example, in one embodiment, the detection component 100 further includes a damping component that interacts with the spool 110 to suppress the rotation of the spool 110 in the event of a thread breakage. Specifically, the damping component can be a damping plate mounted on the housing 910, which abuts against the spool 110 and the housing 910 to prevent it from spinning freely. When a thread breakage occurs, the damping plate can quickly stop the spool 110, which is not driven by the thread 900, thereby improving the sensitivity of the detection component 100 to the thread breakage action.

[0057] Reference Appendix Figure 4 In the illustrated embodiment, the thread breakage detection device further includes a first thread clamp 130, which can further improve the stability of the suture 900 movement. The first thread clamp 130 includes:

[0058] The bracket 131 has an inlet hole 132 and an outlet hole 133, through which the thread 900 enters and exits through the inlet hole 132;

[0059] The wire clamping component 134 is mounted on the bracket 131;

[0060] Along the direction of movement of the sewing thread 900, the thread wheel 110 is located between the thread clamping component 134 and the thread outlet hole 133.

[0061] The thread clamping component 134 can be implemented using existing technology. It applies a preset clamping force to the thread 900 to maintain the stability of the thread's movement and to drive the thread wheel 110. The bracket 131 of the first thread clamp 130, in addition to stabilizing the thread 900, can also provide a mounting location for the detection component 100. In this embodiment, the induction coil 122 is mounted on the bracket 131, which can be achieved through various methods such as bonding, snap-fitting, or welding. The center of the induction coil 122 coincides with the center of the thread wheel 110. The first thread clamp 130 and the detection component 100 are located on the side of the housing 910 and are open to the operator, facilitating maintenance and observation of the thread 900 by the operator.

[0062] Correspondingly, the induction coil 122 is a cylindrical structure with multiple turns, entirely encircling the thread reel 110. The internal dimensions of the induction coil 122 are slightly larger than the external dimensions of the thread reel 110 to form a threading gap. This threading gap is open to allow the operator to insert or remove the sewing thread 900 into or from the winding groove 111 of the thread reel 110. Along the threading path of the sewing thread 900, in conjunction with the attached... Figure 4 The thread 900 passes sequentially through the thread inlet 132, the thread clamping component 134, the upper end of the induction coil 122, around the spool 110 once, the lower end of the induction coil 122, and the thread outlet 133. During this process, the thread 900 does not interfere with the induction coil 122. The thread 900 can pass through the gaps between the multiple turns of the induction coil 122.

[0063] Furthermore, the thread breakage detection device also includes a second thread clamp 140. The first thread clamp 130 and the second thread clamp 140 are arranged sequentially along the movement direction of the sewing thread 900. The first thread clamp 130 and the second thread clamp 140 provide a relatively stable operating range for the sewing thread 900, thereby ensuring the stability of the detection component 100. After the sewing thread 900 leaves the thread outlet hole 133 of the first thread clamp 130, it passes sequentially through the second thread clamp 140, the fixed thread catch hook, the right thread hook, the thread take-up lever, the left thread hook, the electronic thread clamp, the thread hook under the needle bar, and the needle 211, finally participating in the sewing operation.

[0064] Reference Appendix Figure 3In the illustrated embodiment, the feed mechanism 320 includes a feed crank 322 linked to the sewing machine main shaft 210, a feed shaft 321 linked to the feed teeth, and a variable mechanism linking the feed shaft 321 and the feed crank 322. The feed shaft 321 is arranged parallel to the sewing machine main shaft 210, which is located above the machine housing 910. Correspondingly, the main shaft motor is located at the rear of the machine housing 910. The stitch length adjustment motor 310 is located at the rear of the machine housing 910 and below the main shaft motor. The feed crank 322 is linked from the sewing machine main shaft 210 to the vicinity of the feed shaft 321. When the sewing machine main shaft 210 rotates, it drives the feed crank 322 to produce a reciprocating motion in its own axial direction, thereby driving the feed shaft. The feed shaft 321 is equipped with feed dogs via the feed frame 323. The feed dogs cooperate with the fabric 920 to drive the fabric 920 to move relative to the needle 211 on the sewing table. The needle 211 drives the thread 900 to form a stitch on the fabric. The variable mechanism itself can be implemented in conjunction with existing technology, for example, by adjusting the linkage 311 to be linked to a manual drive mechanism or the stitch length adjustment motor 310 in this application. When the stitch length adjustment motor 310 rotates to a preset angle, the feed shaft 321 and the feed crank 322 are linked according to a preset transmission relationship, that is, the feed dogs and the needle 211 cooperate with each other according to a preset relationship, which is the stitch length mentioned above. In this embodiment, the stitch length is changed according to the thread breakage signal by adjusting the stitch length to 0 stitch length or negative stitch length, and the feed mechanism 320 stops feeding or reverses feeding accordingly. When a thread breaks, the needle 211 moves up and down in its original position (corresponding to 0 stitch length and stopping fabric feeding) or re-needles on the existing needle holes (corresponding to negative stitch length and reverse fabric feeding) to prevent creating new needle holes and avoid wasting sewing material.

[0065] In conjunction with the embodiments described above, one embodiment of this application also discloses a sewing device, including the thread breakage detection device described in the embodiments above. The thread breakage detection device can be implemented based on the above description, and other structures of the sewing device can be implemented using existing technology, which will not be elaborated further here.

[0066] Reference Appendix Figure 6 As shown, in conjunction with the embodiments described above, one embodiment of this application discloses a method for controlling thread breakage in a sewing machine, comprising:

[0067] Detects the suture 900 status and generates a suture breakage signal when the suture is broken;

[0068] In response to a thread breakage signal, the main spindle motor of the sewing equipment stops running and the stitch length is adjusted accordingly.

[0069] Compared to existing technical solutions, or solutions that intervene in the sewing machine's main shaft 210 and main shaft motor, this embodiment actively adjusts the stitch length based on the thread breakage signal. This effectively avoids the disadvantage that the sewing machine's main shaft 210 cannot stop abruptly, and leverages the fast response of the stitch length adjustment motor 310. It offers good overall adaptability and high production efficiency. Furthermore, when detecting the state of the sewing thread 900, a thread wheel 110 that follows the sewing thread 900 is provided, and a thread breakage is determined when the thread wheel 110 stops rotating. The stitch length is changed by adjusting it to 0 stitch length, so that the position of the last needle hole on the fabric before the thread breakage corresponds to the position of the sewing machine's needle 211. Alternatively, the stitch length can be changed by adjusting it to a negative stitch length, so that the fabric moves in the opposite direction to its movement before the thread breakage, and the movement distance is 1 to 8 stitch lengths.

[0070] During the reverse movement of the fabric relative to its original direction of motion before the thread breakage, the distance of movement maintains the original stitch length. For example, when a thread breaks during a forward sewing operation with a stitch length of N, the stitch length is adjusted to 0 or negative N to ensure that the needle can accurately return to its original position on the fabric.

[0071] The thread breakage control method of the sewing equipment in this embodiment can also be implemented based on the thread breakage detection device and sewing equipment mentioned in the above embodiments.

[0072] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A thread breakage detection device for sewing equipment, characterized in that, include: A detection component is used to detect the breakage status of the suture and generate a breakage signal accordingly. The first drive assembly includes a sewing machine spindle and a spindle motor that are connected by a transmission, the spindle motor stopping in response to the thread breakage signal; The second drive assembly includes a fabric feeding mechanism driven by the sewing machine spindle and a stitch length adjustment motor that changes the transmission relationship between the sewing machine spindle and the fabric feeding mechanism. The stitch length adjustment motor changes the stitch length accordingly based on the thread breakage signal.

2. The thread breakage detection device for sewing equipment according to claim 1, characterized in that, The detection component includes: A thread spool for winding the sewing thread and rotating under the drive of the sewing thread; the thread spool stops rotating when the sewing thread is broken. A detector senses the rotation of the spool and generates the wire breakage signal when the spool stops rotating.

3. The thread breakage detection device for sewing equipment according to claim 2, characterized in that, The reel is fixedly equipped with a magnetic component, and the detector has an induction coil located on the outer periphery of the reel to detect the movement of the magnetic component.

4. The thread breakage detection device for sewing equipment according to claim 2, characterized in that, The detection component also includes: A damping component interacts with the spool to suppress the rotation of the spool in the event of a broken wire.

5. The thread breakage detection device for sewing equipment according to claim 2, characterized in that, The needle spacing adjustment motor changes the needle spacing according to the broken thread signal by adjusting the needle spacing to 0 needle spacing or negative needle spacing, and the fabric feeding mechanism stops feeding or reverses feeding accordingly.

6. The thread breakage detection device for sewing equipment according to claim 2, characterized in that, The thread breakage detection device further includes a first thread clamp and a second thread clamp arranged sequentially along the direction of thread movement, with the thread wheel located between the first thread clamp and the second thread clamp.

7. The thread breakage detection device for sewing equipment according to claim 6, characterized in that, The first wire clamp includes: The bracket has an inlet and an outlet cable hole; A thread clamping component is installed on the bracket along the direction of thread movement, and the thread wheel is located between the thread clamping component and the thread outlet hole.

8. A sewing machine, characterized in that, The device includes the wire breakage detection device according to any one of claims 1 to 7.

9. A method for controlling thread breakage in sewing equipment, characterized in that, include: Detects the suture condition and generates a suture breakage signal when the suture is broken; In response to the thread breakage signal, the main spindle motor of the sewing equipment stops running and the stitch length is changed accordingly.

10. The thread breakage control method for sewing equipment according to claim 9, characterized in that, When detecting the condition of the suture, a thread wheel that follows the suture is provided, and the thread breakage is determined when the thread wheel stops rotating. The method for changing the stitch spacing is as follows: Adjust the stitch length to 0 stitch length so that the position of the last needle hole on the fabric before the thread breaks corresponds to the position of the needle of the sewing machine; Alternatively, adjust the stitch length to a negative stitch length so that the fabric moves in the opposite direction to its movement before the thread breaks, and the movement distance is 1 to 8 stitch lengths.

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